Which box must be completed to indicate if there is additional insurance?

To indicate if there is additional insurance, it is necessary to complete Box 11d on the claim form. This specific box is designed to capture information about any other insurance coverage that the patient may have beyond the primary insurance. If a patient holds multiple insurance policies, the details entered in this box help ensure that the insurance providers are informed of all potentially liable parties, facilitating proper coordination of benefits and accurate claim processing.

Boxes such as 9, 10, and 12 serve different functions. For instance, Box 9 is typically used for the patient's other insurance information but not specifically for indicating additional insurance. Box 10 may refer to policy or group numbers and does not pertain directly to indicating the presence of additional insurance. Box 12 is usually used to enter information regarding a patient’s dependents, not insurance coverage. Understanding the specific purpose of each box on the claim form is essential for accurate and efficient insurance processing.